openssl.cnf

[ ca ]
default_ca = testca

[ testca ]
dir = /home/testca
certificate = $dir/cacert.pem
database = $dir/index.txt
new_certs_dir = $dir/certs
private_key = $dir/private/cakey.pem
serial = $dir/serial

default_crl_days = 7
default_days = 365
default_md = sha256

policy = testca_policy
x509_extensions = certificate_extensions

[ testca_policy ]
commonName = supplied
stateOrProvinceName = optional
countryName = optional
emailAddress = optional
organizationName = optional
organizationalUnitName = optional
domainComponent = optional

[ certificate_extensions ]
basicConstraints = CA:false

[ req ]
default_bits = 2048
default_keyfile = ./private/cakey.pem
default_md = sha256
prompt = yes
distinguished_name = root_ca_distinguished_name
x509_extensions = root_ca_extensions

[ root_ca_distinguished_name ]
commonName = hostname

[ root_ca_extensions ]
basicConstraints = CA:true
keyUsage = keyCertSign, cRLSign

[ client_ca_extensions ]
basicConstraints = CA:false
keyUsage = digitalSignature
extendedKeyUsage = 1.3.6.1.5.5.7.3.2

[ server_ca_extensions ]
basicConstraints = CA:false
keyUsage = keyEncipherment
extendedKeyUsage = 1.3.6.1.5.5.7.3.1